The concept of blockchain and cryptocurrencies is one the most popular concepts recent years. Cryptocurrencies were first introduces with Bitcoin in 2008 now they have an increasing variety popularity. Recent developments technology firms brought into question whether there a relationship between indexes. To this end, study investigates causality indexes using monthly data years 2016 2021 G7 E7...

Advances in mobile technologies and devices has changed the way users interact with devices and other users. These new interaction methods and services are offered by the help of intelligent sensing capabilities, using context, location and motion sensors. However, indoor location sensing is mostly achieved by utilizing radio signal (Wi-Fi, Bluetooth, GSM etc.) and nearest neighbor identificati...

[1] This study examines the short‐term (∼15 year) effects of controlling fossil‐fuel soot (FS) (black carbon (BC), primary organic matter (POM), and S(IV) (H2SO4(aq), HSO4 , and SO4 )), solid‐biofuel soot and gases (BSG) (BC, POM, S(IV), K, Na, Ca, Mg, NH4 , NO3 , Cl and several dozen gases, including CO2 and CH4), and methane on global and Arctic temperatures, cloudiness, precipitation, and at...

Long path length FTIR-smog chamber techniques were used to determine k(Cl + CF3CF@CH2) = (7.03 ± 0.59) · 10 , k(OH + CF3CF@CH2) = (1.05 ± 0.17) · 10 , and k(O3 + CF3CF@CH2) = (2.77 ± 0.21) · 10 21 cm molecule 1 s 1 in 700 Torr of N2, N2/O2, or air diluent at 296 K. CF3CF@CH2 has an atmospheric lifetime of approximately 11 days and a global warming potential (100 yr time horizon) of four. CF3CF@...

We study the global stability, the periodic character, and the boundedness character of the positive solutions of the difference equation xn 1 α − βxn / γ − δxn − xn−k , n 0, 1, 2, . . . , k ∈ {1, 2, . . .}, in the two cases: i δ ≥ 0, α > 0, γ > β > 0; ii δ ≥ 0, α 0, γ, β > 0, where the coefficients α, β, γ, and δ, and the initial conditions x−k, x−k 1, . . . , x−1, x0 are real numbers. We show...

We show that if (u,K) is a global minimizer for the Mumford-Shah functional in R , and if K is a smooth enough cone, then (modulo constants) u is a homogenous function of degree 1 2 . We deduce some applications in R as for instance that an angular sector cannot be the singular set of a global minimizer, that if K is a half-plane then u is the corresponding cracktip function of two variables, o...

We show that modal logic over universally first-order definable classes of transitive frames is decidable. More precisely, let K be an arbitrary class of transitive Kripke frames definable by a universal first-order sentence. We show that the global and finite global satisfiability problems of modal logic over K are decidable in NP, regardless of choice of K. We also show that the local satisfi...

In this paper, we examine John Tate’s seminal work calculating functional equations for zeta functions over a number field k. Tate examines both ‘local’ properties of k, completed with respect to a given norm, and ‘global’ properties. The global theory examines the idele and adele groups of k as a way of encoding information from all of the completions of k into single structures, each with its...

Résumer. Dans cet article nous présentons une simple technique d'initialisation du k-means dans le but de maximiser la séparabilité et la compacité des groupes et ceci en choisissant l'objet le plus mal classé comme étant le nouveau centre du groupe. L'utilisation de cette technique peut se faire soit par intégration directe dans la phase d'initialisation du classique k-means ou bien dans une a...

This paper is devoted to investigate the global behavior of the following rational difference equation: yn 1 αyn−t/ β γ ∑k i 0 y p n− 2i 1 ∏k i 0y q n− 2i 1 , n 0, 1, 2, . . ., where α, β, γ, p, q ∈ 0,∞ and k, t ∈ {0, 1, 2, . . .} with the initial conditions x0, x−1, . . . , x−2k, x−2max{k,t}−1 ∈ 0,∞ . We will find and classify the equilibrium points of the equations under studying and then inv...